Adjusment for revolving and tilting chairs.



C. J. TRAVERS- ADJUSTMENT FOR REVOLVING AND TILTING CHAIRS. APPLICATION FILED Aug. 16. 1917.

2 SHEETS-S 1,268,157., Patented Apr. 16,1918.

HEET I.

AIIIII 1/ C. J. TRAVERS.

ADJUSTMENT FOR REVOLVING AND TILTING CHAIRS.

APPLICATION FILED AUG-16.1917- 1,263,157; 4 Patented Apr. 16, 1918.

2 SHEETS-SHEET 2.

" mum" CHARLES J. TRAVERS, OF PORT WASHINGTON, WISCONSIN, ASSIGNOR TO- GILSON MANUFACTURING 00., A CORPORATION OF WISCONSIN.

ADJUSTMENT IEOR REVOLVING AND TILTING CHAIR'S.

To all whom it may concern:

Be it known that I, CHARLns- J. TRAVERS, a citizen of the United States, residing at Port l/Vashington, in the county of Ozaukee and State of \Visconsin, have invented a new and useful Adjustment for Revolving and Tilting Chairs, of which the following is a specification. 7

This invention relates to improvements in adjustments for chairs, commonly called chair-irons, and more particularly to that class of the latter used in connection with revolving and tilting chairs and involving a hollow hub from which radiate the chair legs, forming the base or support, and a swiveled sleeve in the bore of which latter a plain seat supporting standard is mounted for vertical reciprocation, the adjustment of the latter being obtained through a threaded adjusting-screw situated at one side of the standard and heretofore journaled at its lower end in the upper end of the said sleeve and at its upper end in the yoke.

Among the prime objects of the present invention is to simplify, strengthen, as well as cheapen the construction of chair-iron referred to, and, furthermore, to provide a new and improved yoke formed integrally from a sheet-metal blank and especially adapted for use in connection therewith.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be particularly pointed out in the claims.

Referring to the drawings;

Figure 1 is a central vertical sectional view of a chair-iron typifying my invention;

Fig. 2 is a front elevation in detail of the rotatable sleeve; and parts carried thereby;

Fig. 3 is a transverse section of the latter taken on the line 3-3 of Fig. 2;

Fig. 4 is a plan view of the sleeve in detail; and f I Fig. 5 is aplan view of the sheetnnetal blank before folding from which the yoke is formed.

Similar numerals of reference indicate similar parts in all the figures of the draw- The hub may be of any desired construction, the same forming no part of my present invention. In the present instance, but merely for illustration, it consists of the tubular body-portion 1, and the upper and lower plates 2 and 3 respectively, and be- Specification of Letters Patent. Patented Apr. 16, 1918.

Application filed August 16, 1917.

Serial No. 186,439.

tween'these plates and abutting at their-inner ends against the hub, it will be under-' stood, are the legs (not shown), screws being passed through the plates and into the legs for t he purpose of retaining the latter in positron.

Within the hub is mounted to rotate the cast-metal sleeve 4, the same being supported upon'the' upper plate 2 of the hub by means of an integrally formed annular bearingflange 5, between the underside of which and the plate 2, it will be understood, anysuitable anti-friction devices may be located The hub, or rather the tubular body-portion 1 thereof, may be of any. desired shape in cross-section, but the openings 6, in the upper and lower plates 3 and t, it will' 'be understood are annular and approximate the diameters of upper and lower external bosses Y, formed integrally upon the sleeve l adjacent the upper and lower ends of the same. In this manner, it will be apparent,=the

sleeve is rotatably mounted within and upon 1 the sheet-metal hub. Any ordinarymeans may be utilized for preventing accidental withdrawal of the sleeve from the hub, as for instance, as would be caused byfa lifting of the chair. For this purpose I may tap a hole in the underside of the sleeve and insert a retaining-screw 8, the head of which extends radially under the lower end, of the lhubi I Slightly at one side of its center, the sleeve l is provided with a plain bore 9, the same extending preferably throughout the length of the sleeve, and at one side of the bore a second smaller bore 10 is formed,,the latter being threaded, as shown.

Within the bore 9 is mounted for recipro cation the plain unthreaded adj Listing-standard 11, and threaded in the bore 10, is the adjusting-screw l2, utilized, as will herein after appear, as a means for raising and lowering the standard.

At the upper end of the adjusting-standard is located the yoke in which is mounted the usual form of spreader (not shown), the upper end of the adjusting-screw being operable by the usual hand-wheel and j ournaled at its upper end in the yoke. The yoke may be of any ordinary construction but I prefer one constructed as shownand formed of the sheet-metal blank illustrated in Fig. 5 of the drawing, to which latter figure I will now particularly refer.

This blank comprises a substantially rectangular shaped central body-portion 13, designed to be bent upon the dotted-lines 14, 15 and 16, which thus, in the completed article, produces a yoke with upper and lower plates 17 and 18, respectively, and a vertically disposed flange 19, the two plates 17 and 18, being connected by a front vertical wall. (See Figs. 1 and 2.)

From the opposite edges of the bank, between the transverse fold lines 15 and 16, extend lateral integral wings 21, which, after the central body-portion of the blank is folded in the manner described, are folded inward or toward each other and against the edges of the plates 17 and 18. The latter are preferably provided. with tenons 22, and these are received by corresponding openings 28, formed in the wings 21, beyond which latter the tenons are upset, so that the several parts composing the yoke. are all rigidly connected together.

The upper and lower plates of the yoke are formed with alining holes 24 and 25, the former for the purpose of receiving the upper reduced end of the adjusting-standard 11, above which said standard is upset, and the hole 25 for the purpose of receiving the upper reduced end of the adjustingscrew 12. By upsetting the upper end of the adjusting-standard the yoke becomes permanently attached thereto, the lower plate 18 of the yoke resting upon the annular shoulder 26, of the standard, formed by the reduction thereof. By reducing the upper end of the adjusting-screw from a point below the lower plate 18 of the yoke, a shoulder 27, is formed on the screw, and upon the latter and above the shoulder I mount a washer 28. The upper end of the adjusting-screw extends abo e the upper plate 17, and secured thereto is an ordinary hand-wheel 29, through which the adjusting-screw may be operated.

The upper end of the yoke is, in this instance, designed so as to receive one of the ordinary and well-known forms of spreader, but it will be understood that the yoke may be varied in this respect to accommodate the style of spreader to be used, the construction of the latter forming no part of my invention.

In order to lend additional strength to that portion of the yoke subjected to the greatest strain in the ordinary use of the chair, I may mount upon the upper reduced end 30, of the adjusting-standard, a short spacing-sleeve 31, the same being interposed between the two plates 17 and .18.

From a yoke such as I have described, the maximum amount of rigidity and strength results, and yet, at the same time, it is very' simple of manufacture and being of sheetmetal, is cheap and light,

In operation, to raise and lower the chairseat, it is simply necessary to rotate the hand-wheel 29, and the latter being located at the front, such may be readily accomplished. The openings 25 in the yoke through which the upper reduced end of the adj Listing-screw passes may be made slightly larger than the screw, so as to permit of a limited amount of play of the yoke, as is occasioned by use, without imparting any vibrations to the screw, so that the latter is not apt to become so readily worn in its threads. The entire strain is assumed by the adjusting-standard 11, and this being perfectly plain and unthreaded, will retain its fit within the sleeve, so that the entire adjustment will remain tight and not readily become loosened up from wear.

Having described my invention, what I claim, is:

1. In a chair of the class described, the combination with a base, of a sleeve rotatably mounted therein and provided with a plain and a threaded bore, an adjusting standard mounted for vertical 7 movement in the plain bore, a yoke at, the upper end of said standard, an adjusting-screw located in the threaded bore and adapted to raise and lower the yoke, and a hand-wheel carried by the screw.

2. In a chair of the class describedfihe combination with a bored hub, of a sleeve rotatably mounted therein and provided with a plain and a threaded bore, an ad-, justing-standard mounted for vertical move ment in the plain bore, a yoke at the upper end of the standard, an adjusting-screw located in the threaded bore and juurnaled above the sleeve in the yoke, and a handwheel carried by the adjusting-screw.

3. In a chair of the class described, the combination with a bored hub, of a sleeve rotatably mounted therein and provided at its upper end with an annular flange overlapping the hub and with a plain and a threaded bore formed longitudinally in the sleeve and parallel to each other, a plain unthreaded adjusting-screw mounted for vertical movement in the unthreaded bore of the leeve, a yoke at the upper end of the same, an adjusting-screw threaded in the threaded bore of the sleeve and journaled at its upper end in the yoke, and a handwheel Carri d by the adjusting-screw.

- 4:. In a chair of the class described, the combination with a hollow hub having up per and lowe annular bearings, ofa sleeve having upper and lower external bearings corresponding to those of the hub V and above the hub provided with an annular bearing-flange, said sleeve being rotatable within the hub, and further provided with a plain unthreaded and a parallel threaded bore, a plain unthreaded standard mounted for vertical movement in the unthreaded bore of the sleeve, a yoke at the upper end of the game, an adjusting-screw located in the threaded bearing of the sleeve and above the same j ournaled in the yoke, and a handwheel carried by the adjusting-screw.

5. In a chair of the' class described, the combination with a sheetmetal hub, the same comprising a hollow intermediate body-portion and upper and lower leg-embracing plates, the latter having annular openings forming upper and lower bearings in the said body-portion, of a cast-metal sleeve mounted in the body-portion and provided with an upper bearing-flange overlapping the upper plate of the hub and be low the same with upper and lower annular bearing-bosses corresponding to the bearings of the hub and further provided with parallel bores, one of which is threaded and the other of which is plain, an adjusting-standard located for vertical movement in the plain bore of the sleeve, a yoke at the upper end of the standard, an ad justing-screw threaded in the threaded bore of the sleeve, and journaled above the same in an opening in the yoke, and a handwheel mounted on the upper end of the hand-wheel.

6. In a chair of the class described, the combination with a hub, a sleeve rotatably mounted therein and having a bore, an adjusting-standard mounted for vertical movement in said bore of the sleeve, and a yoke at the upper end of the adjustingstandard, of means carried by the sleeve independent of the adjusting standard for adjusting the yoke.

7. In a chair of the class described, the

combination with a hollow hub and a bored sleeve mounted for rotation therein, of an adjusting-standard adapted for vertical movement in the bore of the sleeve, a horizontally dispossed U-shaped yoke at the upper end of the standardv and provided with opposite wings, and means carried by the sleeve independent of the adjustingstandard for adjusting the standard and voke.

V 8. In a chair of the class described, the com bination with a hollow hub, a sleeve mounted rotatively therein and provided with a plain and a threaded bore, a plain adjustingstandard located and adapted for vertical movement in the plain bore, a horizontally disposed U-shaped sheet-metal yoke mounted at the upper end of the adjusting-standard and having side-wings or extensions vertically disposed, and a spacing-sleeve encircling the upper end of the adjustingstandard between the upper and lower walls of the yoke, of an adjusting-screw seated in the threaded bore of the rotatable sleeve, journaled at its upper end in the upper and lower walls of the yoke, and hand-wheel mounted on the upper end of the adjustingscrew above the yoke.

9. In a chair of the class described, the

combination with a hollow hub, a sleeve mounted rotatably therein and provided with a plain and a threaded bore, of an justing-standard mounted for vertical movement in the plain bore and having its upper end reduced to form a shoulder, a sheet-metal U-shaped yoke horizontally disposed and provided with openings in its upper and lower walls to receive the upper reduced end of the standard, above which said standard is upset, and adjusting-screw mounted in the threaded bore of thesleeve and having its upper end reduced to form a shoulder and extended through openings in the upper and lower walls of the yoke, a washer resting on the shoulder of the screw and supporting the lower wall of the yoke, and a hand-wheel mounted on the upper end of the screw above the yoke.

10. In a chair of the class described, the combination with a hollow hub, and a sleeve rotatably mounted therein and provided with a plain and a threaded bore, of a plain adjusting-standard mounted in the plain bore, and having a reduced upper endforming a shoulder, an adjusting-screw located in the threaded bore and having its upper end reduced to form a shoulder, a washer on the latter, a horizontally disposed U- shaped yoke formed of sheet-metal and having openings to receive the upper reduced ends of the adjusting-standard and adjusting-screw, a hand-wheel at the upper end of the adjusting screw, and a spacing-sleeve at the upper end of the ad justing-standard and interposed between the upper and lower walls of the yoke.

11. In a chair of the class described, the

combination with the hollow hub, the sleeve rotatably mounted therein and having a plain and a threaded bore, of an adjustingstandard mounted for vertical movement in the plain bore, an adjusting-screw mounted in the threaded bore, a sheet-metal yoke comprising upper and lower and a rear connecting-walls, and opposite vertically disposed side extensions or Wings, said upper and lower walls of the yoke being provided with vertically alining holes for the reception of the upper ends of the adjusting-standard and adjusting-screw, and a hand-wheel carried by the adjustingscrew.

CHARLES J. TRAVERS.

Witnesses H. WV. BoLENs, T. A. BOERNER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D, 0. 

